Tilting three- and four-wheelers make a lot of sense - they're almost as narrow and light as motorcycles, and perhaps even more maneuverable, but they offer enormous amounts of grip and stability. There's so many new narrow track vehicle designs sprouting up all over the world right now that it's easy to see them becoming a significant part of the commuting mix in the congested cities of tomorrow. So here's three new designs we spotted at EICMA Milan - one electric four wheeler, a petrol powered three wheeler and an aggressively styled four wheel tilter that seems to have off-road ambitions.